Defender 3kVA Portable Transformer 110V 3000W (E203010)

Product Information

Prompt and reliable but slightly more expensive than alternative suppliers, but chosen because of reputation and service . Transformers convert energy from the source to the power required by the load. To use their transformers effectively, businesses need to know how much power their particular transformers can give them.A transformer’s rating provides that information. The transformer typically consists of two windings, a primary and secondary winding. Input power flows through the primary winding. The secondary winding then converts the power and sends it to the load through its input leads. A transformer’s rating, or size, is its power level in kilovolt-amperes. A three-phase transformer can take one of a few different forms. It typically has three lines of power, where each line is out of phase with the other two by 120 degrees. The last step is to convert the figure in kilowatts to kilovolt-amperes. When you do that, you’ll need to divide by 0.8, which represents the typical power factor of a load. In the example above, you’d divide 7.5 by 0.8 to get 9.375 kVA.

The primary and secondary circuits coil around the magnetic part of the transformer. A couple of different factors determine the secondary voltage — the number of turns in the coils and the voltage and current of the primary circuit. NOTE: We do not recommend loading a transformer above 80% of its KVA rating. When the KVA rating has been calculated, divide that number by 0.8 to get the minimum KVA rating needed. All values should be reviewed and confirmed by an electrician or electrical engineer. Additional Standards/Certificates:Low Voltage Direct. (72/73/EEC), EMC Direct. (89/336/EEC), Machinery Direct. (89/392/EEC). Generally to BSEN 61558 To determine your kVA size, you’ll need to make a series of calculations based on your electrical schematics. However, if you start your transformer often — say more than once an hour — you may want a kVA even larger than your calculated size. And if you’re working with specialized loads, such as those found with motors or medical equipment, your kVA requirements may differ substantially. For specialized applications, you’ll probably want to consult a professional transformer company for advice on what kVA you need.The equation for three-phase transformers, which we’ll discuss in more detail below, is also slightly different. When you’re doing calculations with three-phase transformers, you’ll need to include a constant to make sure your work comes out correctly. Standard Transformer Sizes

Before you can calculate the necessary kVA for your transformer, you’ll need to figure out your load voltage, which is the voltage required to operate the electrical load. To determine your load voltage, you can look at your electrical schematic. Assemblies are manufactured to our own exacting standards and come equipped with all necessary switchgear and distribution equipment, as required.So if you’re working with a three-phase transformer, instead of multiplying the voltage by the amperage and dividing by 1,000 to get the kVA, you’ll multiply the voltage by the amperage by 1.732 and still divide by 1,000 to get the kVA. Good product, excellent competitive price and delivery exactly as promised. What better service could you ask for?

You’ll then need to determine the particular current flow your electrical load requires. You can look at the electrical schematic to determine this number as well. If you can’t locate the required current flow, you can calculate it by dividing the input voltage by the input resistance. Let’s say the required load phase current, which we’ll call l, is 50 amperes. In the example above, you would multiply 150 by 50 to get 7,500 and then divide that number by 1,000 to get 7.5 kilowatts. It is advised that the kVA of the transformer should be equal to or greater than the rating of the load to handle present requirements. The kVA rating will also be affected by the application of the load, for example motors may need an increased kVA rating. Transformer Formulas What is the Load Voltage When a piece of electrical equipment malfunctions, the transformer is often the culprit. In that case, you’ll probably need to replace your transformer, and when you do, you’ll need to select one with the correct kVA for your needs. If not, you run the risk of frying your valuable equipment. In many industries, including health care, manufacturing, electrical contracting, higher education and corrections, reliable, high-quality transformers are essential for keeping operations running efficiently. Large facilities and industrial processes require substantial amounts of power, and they need dependable transformers to convert the energy coming from the power plant into a form they can use for their equipment and building utilities.

Thanks you for choosing our product(s). We offer a 12 month warranty for parts and labour against any defects in components or faulty workmanship in manufacturing. When you’re figuring out kVA size, it’s helpful to have the terminology and abbreviations straight before you begin. You’ll sometimes see transformers, especially smaller ones, sized in units of VA. VA stands for volt-amperes. A transformer with a 100 VA rating, for instance, can handle 100 volts at one ampere(amp) of current. You can calculate the voltageof the secondary circuit by using a ratio of the voltage drops through the primary and secondary circuits, along with the number of circuit coils around the magnetic part of the transformer. We’ll use the equation t 1/t 2= V 1/V 2, where t 1is the number of turns in the primary circuit’s coil, t 2is the number of turns in the secondary circuit’s coil, V 1is the voltage drop in the primary circuit’s coil and V 2is the voltage drop in the secondary circuit’s coil. Categories Products Review product LUMER 5KVA Intermittent Rated 5KVA Transformer (Input 240 Volt/Output 110 Volt) We also offer a few different types of brand-newmedium voltage transformers, including dry-type, pad-mount,unit substationandstation-type transformers. We’re also happy to develop custom-built transformersto meet your facility’s unique needs and specifications. We have years of experience supplying transformers for various industries, includingelectrical contractors,electrical supply houses, hospitals and medical clinicsandmanufacturing facilities, among many others.

NOTE: If you need assistance with circuit protection devices such as fuses or breakers, or wire sizing, please consult a licensed electrical contractor or electrician in your area who will be familiar with state and local codes. So you’ll multiply your kVA rating by 1,000 and then divide by the amperage. If your transformer has a kVA rating of 75 and your amperage is 312.5, you’ll plug those numbers into the equation — 75 * 1,000 / 312.5 = 240 volts. How to Determine Secondary Voltage

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All information obtained while using this calculator should be confirmed by a qualified electrical contractor or engineer. Constant pressing of the override button on this transformer is not advised as it may lead to default of product not covered under warranty Once you’ve located or calculated these two figures, you can use them to figure out the load’s power requirements in kilowatts. To do that, you’ll need to multiply the required input voltage (V) by the required current load in amperes (l) and then divide that number by 1,000: In the example above, we divided by 0.8 to increase the kVA of the transformer slightly. Why did we do that?